Viagra is the brand name for the generic drug sildenafil. This prescription medication is indicated to alleviate erection difficulties associated with impotence or erectile dysfunction. Viagra can cause a number of side effects in treated men, including vision alterations. In clinical trials, approximately 3 percent of men taking Viagra developed abnormal vision as a side effect of treatment, according to health professionals with the U.S. Food and Drug Administration. Men who develop vision side effects while taking Viagra should contact a doctor as soon as possible.
Color Tinge to Vision
Men taking Viagra can develop an unusual color tinge to their vision as a side effect of treatment, warn the FDA. A man may perceive certain objects within his vision to be unusually darker or lighter or abnormally colored. These unusual changes in vision are typically mild and can occur sporadically.
Increased Light Sensitivity
While taking Viagra, certain men can experience an increased sensitivity to light, reports Drugs.com. Exposure to bright lights or sunlight can cause affected men to squint or close their eyes due to temporary eye discomfort. Increased light sensitivity may elevate a man's risk of developing additional side effects, such as headache or dizziness, while taking Viagra.
Blurred Vision
Abnormally blurred or cloudy vision can occur as a side effect of using Viagra, explains PDRHealth. Blurred vision can cause affected men to appear unsteady or unstable while walking or standing. These vision alterations can arise suddenly and can be dangerous if affected men are driving or participating in potentially hazardous activities. Men who experience recurrent or persistent blurred vision while taking Viagra should seek prompt medical care.
Vision Loss
Men using phosphodiesterase type 5 inhibitors, such as Viagra, can develop sudden loss of vision within one or both eyes, warns RxList. Though rare, vision loss can be a sign of a more serious medical problem called nonarteritic anterior ischemic optic neuropathy, which can result in permanent vision loss. Vision loss that occurs for any reason should be immediately reported to a medical professional to ensure affected men receive prompt and appropriate treatment.
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